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Related Concept Videos

Colloids03:22

Colloids

22.1K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
22.1K
Coagulation01:06

Coagulation

1.7K
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
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Colloids and Suspensions01:17

Colloids and Suspensions

3.9K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
3.9K
The Colloidal State01:29

The Colloidal State

151
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called...
151
Colloidal precipitates01:09

Colloidal precipitates

6.8K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
6.8K

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Synthesis and Characterization of Supramolecular Colloids
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Synthesis and Characterization of Supramolecular Colloids

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Digital Alchemy for Materials Design: Colloids and Beyond.

Greg van Anders1, Daphne Klotsa1,2,3, Andrew S Karas1

  • 1Department of Chemical Engineering, University of Michigan , Ann Arbor, Michigan 48109-2136, United States.

ACS Nano
|September 25, 2015
PubMed
Summary
This summary is machine-generated.

Scientists developed "digital alchemy" to precisely link nanoparticle properties to the bulk materials they form. This method optimizes building blocks for desired structures, advancing materials science and self-assembly principles.

Keywords:
anisotropy dimensionscolloidsdigital alchemymaterials designpatchy particlesshape entropystructure−property relationships

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Area of Science:

  • Materials Science
  • Statistical Thermodynamics
  • Nanotechnology

Background:

  • Historically, material synthesis aimed to modify basic building blocks, a goal pursued since early alchemists.
  • Nanoscale synthesis enables versatile building blocks, but linking their attributes to bulk structure is challenging.
  • Rational material engineering requires understanding the direct connection between building block properties and final material structure.

Purpose of the Study:

  • To develop a framework for directly and quantitatively linking building block attributes to bulk structure.
  • To exploit the malleability of colloidal nanoparticle valence for material design.
  • To optimize building blocks for target structures and identify key attributes for self-assembly.

Main Methods:

  • Introduced a statistical thermodynamic framework termed "digital alchemy".
  • Utilized thermodynamic response functions, moduli, and susceptibilities to analyze self-assembly.
  • Applied the framework to colloidal systems including truncated tetrahedra, rhombic dodecahedra, and spheres.

Main Results:

  • Established direct, quantitative links between colloidal building block attributes and their bulk structures.
  • Demonstrated optimization of building blocks for specific target structures (diamond, fcc, quasicrystal).
  • Identified critical building block attributes for successful self-assembly.

Conclusions:

  • "Digital alchemy" provides a method to engineer emergent behaviors in materials by controlling building blocks.
  • The framework offers solutions for optimizing self-assembly across various systems, including those beyond colloidal particles.
  • This work advances the rational design of complex materials from nanoscale components.